Propeller for vessels



(Model.)

R. GAwNE. PROPELLER FOR VESSELS.'r

No. 244,582. Patente July 19., 1881.

ATTORNEYS.

UNITED STATES i ROBERT 'G AWNE, OF TOLEDO, OHIO.

. PRoPi-:LLER FOR vEssELs.

SPECIFICATION forming part of Letters Patent No. 244,582, dated July 19, 1881.

Application lenhprn'as, 1881. (Model.)

To all 'whom t may concern;

Be it known that I, ROBERT GAWNE, of Toledo, in the county of Lucas and State of Ohio, have 'invented a-new and useful Im- 5 provement in Propellers'for Vessels, of which the following is a full, clear, and exact description. The invention consists in combining a pinion having a notched hub, a loose sleeveV havin g a notched flange, a cylinder having a stud, and anfengine drive-shaft havinga pinion, with a cylinder carrying an eccentricallyarranged propeller-shaft, as hereinafter described.

In the accompanyingdrawings, Figure l is a sectional side'view of thestern portionof a boat fitted with the improved mechanism. Fig. 2 is an end view at the stern, and Fig. 3 is'a plan view. Similar letters ot' reference indicate corresponding parts.

A is a hollow cylinder, fitted in the vessel 'E at the stern and extending through the stern-post below the water-line. The cylinder extends within the vessel tonear the engine,

and its diameter will be proportioned to the extent of rise and fall it is desired to obtain for the propeller. Itis sustained at the sternpost by a box,. a, suitably packed to prevent inlet of water, and the inboard end is sustained in a box on a pillow-block, b.

Through the'cylinder A passes the shaft c, carrying propeller d, and at the inner end iitted with a pinion, @,for connection ot power. The shaft c is eccentric to the axis of the cylinder, being placed as closely as may be to the side thereof, and is sustained by boxes ff,

- attached upon end plates, g g, that close the ends of the cylinder. Therev isa packinggland, h, on the shaft at the inner box, to prevent leakage.

Around the cylinder A is a brake-strap, t', connected with a hand-lever, la, that is placed for engagementwith a notched bar so that by operating the lever the strap will clamp thecylinder and hold it from turning.

On the end of shaft c next to the pinion e is a'loose sleeve, l, notched to engage with the notched hub of the pinion, and prevented from turning on the shaft by a stud that pro- I vjectsfrom the cylinder and engages .a notched liange of' the sleeve. The sleeve Z may be otherwise connected to the cylinder, so that when it is enga-ged with the pinion theshaftc shall be prevented from vturnin g and the driving-power exerted on the cylinder. A lever, m, connected with sleeve l, servesfor moving the sleeve in and out of engagement with the pinion.

The driving-shaft (shown at mis placed in c line with the central axis of cylinder A and' carries alarge gear-wheel, o, that meshes with pinion c. The pinion will thus be always engaged in any position to which the cylinder may be turned.

It will be seen thatl by a semi-rotation of cylinder A the propeller is shifted from the highest to the lowest point, and can be thus lpositioned according to the load or the depth ot' the water. With alight load the propeller can be brought down into the water to obtain -el'ective action, and with a deep-loaded boat the propeller can be raised in shallow water,

as may be necessary.

To move the cylinder and raise or lower the propeller the clutch l is to be moved by its lever and engaged with pinion e. The propellershaft being thus stopped, the pinion will travel upon Vthe Wheel o and the. cylinder will turn.

Theclutch'is to be released as soon as the propeller is in the desired. position, and the brake then applied to the cylinder.

This mechanism can also be utilized to-prevent the boat making leeway by wind at either side. For this purpose the propeller will be shifted to either side of the center, as required, and will then act to work the boat out and prevent it'from being blown on the banks.

The propeller is fitted with an annular band,

p, secured upon the ends of the blades. This protects the blades from injury and serves to prevent the water from being thrown out sidewise.

This propelling mechanism can be readily and inexpensively applied to ordinary boats. I am aware that a drum or cylinder having the propeller-shaft eccentrically arranged the en gine drive-shaft by ratchet-clutch meoh- 1o anism, substantially as described, whereby the cylinder may be turned with engine-power, to reise or lower the propeller, as set forth.

ROBERT GAWNE.

Witnesses CHARLES W. HALL, PATRICK MITCHELL. 

